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Table 3 238U, 232Th and 235U decay series radionuclides in the Bruchsal brine samples
From: Water–rock interactions in the Bruchsal geothermal system by U–Th series radionuclides
Decay series | Radionuclide | Specific activity (Bq kg−1) | Relative uncertainty (%) | Number of samples | Method |
|---|---|---|---|---|---|
Uranium series | 238U | 0.012 | 59 | 1 | α-spectrometry |
234U | 0.01 | 66 | 1 | α-spectrometry | |
230Th | < 0.08 | 1 | α-spectrometry | ||
226Ra | 29.0 | 8.3 | 13 | γ-spectrometry | |
222Rn | 37.8 | 7.4 | 1 | γ-spectrometry | |
210Pb | 25.8 | 26 | 12 | γ-spectrometry | |
210Po | < 0.1 | 1 | α-spectrometry | ||
Actinium series | 235U | < 0.004 | 1 | α-spectrometry | |
227Ac | < 0.1 | 1 | α-spectrometry | ||
223Ra | 0.47 | 60 | 13 | γ- spectrometry | |
Thorium series | 232Th | < 0.01 | 1 | α-spectrometry | |
228Ra | 15.9 | 5.8 | 13 | γ-spectrometry | |
228Ac | 6.1 | 27 | 2 | γ-spectrometry | |
228Th | < 0.02 | 1 | α-spectrometry | ||
224Ra | 10.3 | 7.5 | 13 | γ-spectrometry | |
212Pb | 15.7 | 6.4 | 2 | γ-spectrometry |